Wood-cutting machine.



No. 705,324. y, Patented July 22, |902. A. cmsmone. y

WO0D lGUTTING MACHINE. (Appli n filed mr. 7, 1902) (No Model.) 2Sheath-Sheet 2.,

@7266606 mzarx UNITED STATES PATENT OFFICE.

JOSEPH A. CRISMORE, OF CHICAGO, ILLINOIS.

wooD-cuTTlNc MACHINE.

SPECIFICATION forming part of Len-ers Patent No. 705,324, dated July22,1902. Application filed March 7, 19025 Serial No. 97,127. (No model.)

To all whom, it may concern:

Be it known that I, JOSEPH A. CRIsMoRE, a citizen of the United States,residing at Chicago, county of Cook, State of Illinois, have invented acertain new and useful Improvement in Wood-Cutting Machines; and Ideclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which litpertains to make and use the same, reference being had to theaccompanying drawings, which form a part of this specification.

Myinvention relates in generalto machines for beveling strips of woodtoform miterjoints, and more particularly to machines for cutting the endsof strips of moldings so as to form simultaneously the miter-loevel andthe grooves to conformY to the contour of the surface of the molding.

In carpentry it is customary in forming joints between moldings to cutin the end of one strip projections and grooves to engage the raisedportions and grooves on the surface of the other strip of the joint. Ithas heretofore been usual to cut the desired bevel on the end of thestrip in one operation and to cut whatis technically known as the coping-that is, the grooves to receive the raised portions of the surface ofthe other strip of the jointbya separate operation. e

'Ihe object of my invention is to produce a machine for cutting stripsof molding so as to form simultaneously the miter-bevel and coping.

A further object of my invention is to provide a machine of thecharacter above referred to which will be simple in construc-y tion,inexpensive in manufacture, and efficient in operation. l

My invention, briefly described, consists in ahorizontally-reciprocating blade the crosssection of the cutting edge ofwhich conforms to the raised and rentrant portions of the surface of themolding, the Vdesired miterbevel being produced by adjusting the angularposition of the molding with respect to the plane of movement of theblade.

My invention will be more fully described hereinafter with reference tothe accompanying drawings, in which the same is illustrated in aconvenient and practical form, and in whichby the blade is to engage.

Figure l is. an elevational view of my invention; Fig. 2, across-sectional view taken on line 2 2, Fig. 1, looking in the directionof the arrows; Fig. 3, a sectional plan view on a plane below the topbar A3; and Fig. 4, a perspective detached view of one of the supports,a portion thereof being broken away.

The same reference characters are used to designate the same parts inall the figures of the drawings. Reference-letter A indicates a base,preferably composed of cast metal and comprising a horizontal portionand a vertical portion. The vertical portion consists in ends A and A2,connected by a top A3. The arrangement of the ends and top with respectto the horizontal portion of the base is such as to form an opening inwhich the cuttingblade is adapted to reciprocate. Grooves as a3 areformed in the under surface of the top portionlA3 and in the uppersurface of the base immediately below4 the top portion. Within thesegrooves is guided a support C, to which is secured the cutting-blade.The end edges of the support C are preferably inclined downwardly, so asto converge at their bottoms, as shown inFig. l. e The support C isprovided with a horizontally-projecting flange c, in the under surfaceofwhich are formed gear-teeth c'. The horizontal portion of the baseimmediately below the iiange c is provided withgear-teeth o. Agear-wheel G is located between the base A and the flange c and isprovided with gear-teeth which mesh with the teeth c and a. Thegear-wheel G is provided with a laterally-projecting portion g', inwhich asocket is formed to receive the lower end of a lever G.

The cutting-blade D is secured to the support C preferably by bolts andslots d CZ, as clearlyindicated in Fig. l. Thecutting edge of the bladeD is of a cross-section to produce in the molding which it engagesgrooves and projections" corresponding to the raised and depressedportions in the surface of the molding with which the end portion whichlis cut In the drawings I have shown the blade as consisting in astraight edge d, an offset cutting portion d2, below which is a straightcutting portion d3 in the same vertical plane as the cutting portion d',and a second offset cutting portion IOO d4, below which is a thirdstraight edge d5 in the same vertical plane as the edges d' and d3. Theblade D is preferably provided with cutting edges at each side thereof,as illustrated in Fig. 1.

The end portions A and A2 of the base of the machine are provided withgrooves a2 and a, located in the path of movement of the odset portionsd2 and d4 of the cutting-blade. The surfaces of the end portions A' andA2 above and below and between the grooves a2 and a4 are in the samevertical plane and are so located as to permit the portions d', d2, andd5 of the cutting-blade to pass in front thereof. In order that thestrips of molding or other material which is to be cut in the machinemay be retained in the path of reciproeation of the blade, adjustablesupports B and B2 are provided. These supports are pivoted adjacent tothe end portions A/ and A2 of the base, so as to swing from a positionat right angles to the plane of the knife toward a plane parallel andadjacent to the blade. These supports may be retained in any desiredangular position with respect to the path of the blade by means ofscrewclamps e engaging groovesf, formed through the horizontal portionof the base. The supports B and B2 may be adjusted so as to vary theangular position of the material which is to be cut with relation to theplane of reciprocatiou of the cutting-blade, thereby determining thedegree of bevel of the miter cut.

The cutting-blade may be of a cross-section to conform to the surface ofa single strip of molding of predetermined design, or the blade may beprovided with cutting portions each of which is adapted to produce a cutedge conforming to a given molding, thereby rendering the machinecapable of cutting edges of different design. The cutting-bladeillustrated in the drawings is adapted to cut the ends of two dierentmoldings, accordingly as the strip to be cutis supported in the plane ofthe lower half of the cuttingblade or in the plane of the upper half ofthe cutting-blade. The odset portion d2, for instance, may be designedto cut a coping of one and one-half inches, while the offset portion d"may be designed to cut a coping of one and three-fourths inches.

In order that the material which is to be cut may be supported inposition to be engaged by either the lower or upper halves of thecutting-blade, the adjustable supports B and B2 are provided with seatsb' and b2, the former of which supports the strip of molding in positionto be engaged by the upper part of the knife, while the latter, b2,retains the molding in position to be engaged by the lower portion ofthe cutting-blade- The operation of my invention is as follows One ofthe supports B or B2 is adjusted to the desired angular position withrespect to the cutting-blade and there secured by means of theclamp-screw c engaging the groove f. If the left cutting edge of theblade is to be used, the support B is adjusted to the desired position,while if the opposite edge of the blade is to do the cutting the otheradjustable support B2 is secured in the desired angular position. Theend of the strip which is to be cutis then inserted in front of thecuttingblade and held against the adjustable support. The lever G' isthen oscillated, which partially rotates the gear G. As the teeth g ofthe gear engage the fixed rack a, the teeth at the upper periphery movein the direction in which the lever is forced, thereby through theengagement of the teeth on the gearwheelwith the rack-bar c' on thesupport C sliding the latter in the guide-grooves a3 a3 and causing thecutting edge of the blade, which is rigidly secured to the support C, toremove that portion of the strip of molding which projects beyond thepath of movement of the blade. The lever G may then be moved in areversed direction, thereby rolling the gear through the engagement ofits teeth with the fixed rack, which reciprocates the knife to itsinitial position through the engagement of the teeth on the gear-wheelwith the rack-bar c on the blade-support C. When the cutting-blade isadapted to cut two or more different copings, if the lower portion ofthe blade is to be used the strip of molding is placed directly upon thehorizontal portion of the base and rests against the lateral projectingportion b2 of the adjustable support B2. If, however, the upper portionof the cutting-blade is to be utilized, the strip of molding is seatedupon the projection b', whereby it is retained in the plane of movementof the upper portion of the blade.

From the foregoing description it will be observed that I have produceda machine for simultaneously cutting a miter and a coping ofpredetermined design, thereby producing at a single operation that whichhas ordinarily heretofore been effected by two separate operations. Itwill also be observed thata miter and two copings of diierent design maybe cut upon a single machine by varying the vertical position of thematerial which is to be cut in the path of the cutting-blade.

While I have described more or less precisely the details ofconstruction, I do not wish to be understood as limiting myself thereto,as I contemplate changes in form, the proportion of parts, and thesubstitution of equivalents, as circumstances may suggest or renderexpedient, Without departing from the spirit of my invention.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-

l. In a machine for simultaneously forming miter and coping cuts, thecombination with a cutting-blade conforming to the contour of thesurface of a molding, of abase upon which the blade is guided having avertical face adjacent to the path of movement of the bladecorresponding to the cutting-surface of the blade, means forreciprocating said blade,

IOO

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and means for 'supporting the molding in the path of the blade.

2. In a machine for simultaneously forming miter and coping cuts, thecombination with a horizontally-reciprocating cuttingblade havingcutting edges at each end thereof conforming to the contoury of thesurface of amolding, of a support to which the blade is rigidly secured,a base upon which said support is guided, means for reciprocating saidsupport, and adjustable means for supporting the molding in the path ofthe blade.

3. In a machine for simultaneously forming miter and coping cuts, anintegral cutting-blade comprising vertically-alined portions conformingto the contour of the surfaces of a plurality of moldings.

4l. In a machine for-simultaneously forming miter and coping cuts, thecombination with a cutting-blade comprising verticallyalined portionsconforming to the contour of the surfaces of a plurality of moldings, ofa support to which said blade is rigidly secured, means for horizontallyreciprocating said support, and means for supporting the molding in thepath of the blade.

5. In a machine for simultaneously forming miter and coping cuts, thecombination with a cutting-blade comprising portions conforming to thecontour of the surfaces of a plurality of moldings, of a support towhich said blade is rigidly secured, means for horizontallyreciprocating said support, and

means for supporting a molding in different horizontal planes in thepath of the blade.

6. In a machine for simultaneously forming miter and coping cuts, thecombination with a cutting-blade comprising portions conforming to thecontour of the surfaces of a plurality of moldings, of a baseupon whichthe blade is guided having a vertical face adjacent to the path ofmovement of the blade corresponding to the cutting-surface of the blade,means for reciprocating said blade, and means for supporting a moldingin the path of movement of the blade.

7. In a machine for simultaneously forming miter and coping cuts, thecombination with a cuttingblade'comprising portions conforming to thecontour of the surfaces of a plurality of moldings, of a base upon whichthe blade is guided having a vertical face adjacent to the path ofmovement of the blade corresponding to the cutting-surface of the blade,means for reciprocating said blade, a

`pivoted support swinging about a vertical axis adjacent to the plane ofmovement of the blade, and a plurality of seats carried by said supportin different horizontal planes to receive a molding and locate the samein the desired vertical relation to the blade.

Intestimony whereofI I sign this specification in the presence of twoWitnesses.

y JOSEPH A. CRISMORE. Witnesses:

J. P. WIBORG, GEO. L. WILKINSON.

